Anchor Bolt for Railway Bridge | Direct Manufacturer

Anchor bolts for railway bridges are critical fasteners used to connect structural bridge components, such as girders and rail tracks, to concrete foundations. These bolts ensure stability and prevent failures by resisting movement from heavy traffic, wind, and seismic activity. 

Common Anchor Bolt Types

• L-Shaped Bolts: Primarily used for fixing sleepers and roadbeds in ordinary railways or turnout areas.

• J-Shaped Bolts: Feature a deeper hook for better pull-out resistance, often used in curved sections or complex terrains.

• U-Shaped Bolts: Used for two-way locking of rails and sleepers, commonly found in high-speed or heavy-haul railways.

• T-Shaped Bolts: Suitable for embedded fixation in both ballasted and ballastless track systems.

• Straight-rod (Headed) Bolts: feature a hex head or plate at the embedded end, providing the strongest pull-out resistance for structural steel columns. 

Material & Performance Specifications

Railway bridge bolts are typically manufactured from high-strength materials to withstand extreme vibrations and loads: 

• Carbon Steel (Q235, 45#): Used for general structural anchoring where cost-efficiency is a priority.

• Alloy Steel (40Cr, 42CrMo, 35CrMo): Preferred for heavy-load railways due to higher tensile and shear strength.

• Stainless Steel (304/316): Essential for coastal or humid environments to prevent long-term corrosion.

• Surface Treatments: Most bolts are Hot Dip Galvanized (HDG) or Dacromet coated to ensure long-term outdoor durability.